Goods classification omission under Schedule 4 alters GST treatment for natural stone setts and curbstones previously listed. Classification under Heading 6801 for setts, curbstones and flagstones of natural stone (except slate) was omitted from Schedule 4 by Notification No. 43/2017 effective 15-11-2017; prior to omission the heading expressly described those natural stone products and was subject to the Schedule 4 GST treatment reflected up to 21-09-2025.